hw/virtio-pci.c

   1 /*
   2  * Virtio PCI Bindings
   3  *
   4  * Copyright IBM, Corp. 2007
   5  * Copyright (c) 2009 CodeSourcery
   6  *
   7  * Authors:
   8  *  Anthony Liguori   <aliguori@us.ibm.com>
   9  *  Paul Brook        <paul@codesourcery.com>
  10  *
  11  * This work is licensed under the terms of the GNU GPL, version 2.  See
  12  * the COPYING file in the top-level directory.
  13  *
  14  */
  15
  16 #include <inttypes.h>
  17
  18 #include "virtio.h"
  19 #include "virtio-blk.h"
  20 #include "virtio-net.h"
  21 #include "pci.h"
  22 #include "qemu-error.h"
  23 #include "msix.h"
  24 #include "net.h"
  25 #include "loader.h"
  26 #include "kvm.h"
  27 #include "blockdev.h"
  28
  29 /* from Linux's linux/virtio_pci.h */
  30
  31 /* A 32-bit r/o bitmask of the features supported by the host */
  32 #define VIRTIO_PCI_HOST_FEATURES        0
  33
  34 /* A 32-bit r/w bitmask of features activated by the guest */
  35 #define VIRTIO_PCI_GUEST_FEATURES       4
  36
  37 /* A 32-bit r/w PFN for the currently selected queue */
  38 #define VIRTIO_PCI_QUEUE_PFN            8
  39
  40 /* A 16-bit r/o queue size for the currently selected queue */
  41 #define VIRTIO_PCI_QUEUE_NUM            12
  42
  43 /* A 16-bit r/w queue selector */
  44 #define VIRTIO_PCI_QUEUE_SEL            14
  45
  46 /* A 16-bit r/w queue notifier */
  47 #define VIRTIO_PCI_QUEUE_NOTIFY         16
  48
  49 /* An 8-bit device status register.  */
  50 #define VIRTIO_PCI_STATUS               18
  51
  52 /* An 8-bit r/o interrupt status register.  Reading the value will return the
  53  * current contents of the ISR and will also clear it.  This is effectively
  54  * a read-and-acknowledge. */
  55 #define VIRTIO_PCI_ISR                  19
  56
  57 /* MSI-X registers: only enabled if MSI-X is enabled. */
  58 /* A 16-bit vector for configuration changes. */
  59 #define VIRTIO_MSI_CONFIG_VECTOR        20
  60 /* A 16-bit vector for selected queue notifications. */
  61 #define VIRTIO_MSI_QUEUE_VECTOR         22
  62
  63 /* Config space size */
  64 #define VIRTIO_PCI_CONFIG_NOMSI         20
  65 #define VIRTIO_PCI_CONFIG_MSI           24
  66 #define VIRTIO_PCI_REGION_SIZE(dev)     (msix_present(dev) ? \
  67                                          VIRTIO_PCI_CONFIG_MSI : \
  68                                          VIRTIO_PCI_CONFIG_NOMSI)
  69
  70 /* The remaining space is defined by each driver as the per-driver
  71  * configuration space */
  72 #define VIRTIO_PCI_CONFIG(dev)          (msix_enabled(dev) ? \
  73                                          VIRTIO_PCI_CONFIG_MSI : \
  74                                          VIRTIO_PCI_CONFIG_NOMSI)
  75
  76 /* Virtio ABI version, if we increment this, we break the guest driver. */
  77 #define VIRTIO_PCI_ABI_VERSION          0
  78
  79 /* How many bits to shift physical queue address written to QUEUE_PFN.
  80  * 12 is historical, and due to x86 page size. */
  81 #define VIRTIO_PCI_QUEUE_ADDR_SHIFT    12
  82
  83 /* We can catch some guest bugs inside here so we continue supporting older
  84    guests. */
  85 #define VIRTIO_PCI_BUG_BUS_MASTER       (1 << 0)
  86
  87 /* QEMU doesn't strictly need write barriers since everything runs in
  88  * lock-step.  We'll leave the calls to wmb() in though to make it obvious for
  89  * KVM or if kqemu gets SMP support.
  90  */
  91 #define wmb() do { } while (0)
  92
  93 /* PCI bindings.  */
  94
  95 typedef struct {
  96     PCIDevice pci_dev;
  97     VirtIODevice *vdev;
  98     uint32_t bugs;
  99     uint32_t addr;
 100     uint32_t class_code;
 101     uint32_t nvectors;
 102     BlockConf block;
 103     NICConf nic;
 104     uint32_t host_features;
 105 #ifdef CONFIG_LINUX
 106     V9fsConf fsconf;
 107 #endif
 108     /* Max. number of ports we can have for a the virtio-serial device */
 109     uint32_t max_virtserial_ports;
 110 } VirtIOPCIProxy;
 111
 112 /* virtio device */
 113
 114 static void virtio_pci_notify(void *opaque, uint16_t vector)
 115 {
 116     VirtIOPCIProxy *proxy = opaque;
 117     if (msix_enabled(&proxy->pci_dev))
 118         msix_notify(&proxy->pci_dev, vector);
 119     else
 120         qemu_set_irq(proxy->pci_dev.irq[0], proxy->vdev->isr & 1);
 121 }
 122
 123 static void virtio_pci_save_config(void * opaque, QEMUFile *f)
 124 {
 125     VirtIOPCIProxy *proxy = opaque;
 126     pci_device_save(&proxy->pci_dev, f);
 127     msix_save(&proxy->pci_dev, f);
 128     if (msix_present(&proxy->pci_dev))
 129         qemu_put_be16(f, proxy->vdev->config_vector);
 130 }
 131
 132 static void virtio_pci_save_queue(void * opaque, int n, QEMUFile *f)
 133 {
 134     VirtIOPCIProxy *proxy = opaque;
 135     if (msix_present(&proxy->pci_dev))
 136         qemu_put_be16(f, virtio_queue_vector(proxy->vdev, n));
 137 }
 138
 139 static int virtio_pci_load_config(void * opaque, QEMUFile *f)
 140 {
 141     VirtIOPCIProxy *proxy = opaque;
 142     int ret;
 143     ret = pci_device_load(&proxy->pci_dev, f);
 144     if (ret) {
 145         return ret;
 146     }
 147     msix_load(&proxy->pci_dev, f);
 148     if (msix_present(&proxy->pci_dev)) {
 149         qemu_get_be16s(f, &proxy->vdev->config_vector);
 150     } else {
 151         proxy->vdev->config_vector = VIRTIO_NO_VECTOR;
 152     }
 153     if (proxy->vdev->config_vector != VIRTIO_NO_VECTOR) {
 154         return msix_vector_use(&proxy->pci_dev, proxy->vdev->config_vector);
 155     }
 156
 157     /* Try to find out if the guest has bus master disabled, but is
 158        in ready state. Then we have a buggy guest OS. */
 159     if ((proxy->vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) &&
 160         !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
 161         proxy->bugs |= VIRTIO_PCI_BUG_BUS_MASTER;
 162     }
 163     return 0;
 164 }
 165
 166 static int virtio_pci_load_queue(void * opaque, int n, QEMUFile *f)
 167 {
 168     VirtIOPCIProxy *proxy = opaque;
 169     uint16_t vector;
 170     if (msix_present(&proxy->pci_dev)) {
 171         qemu_get_be16s(f, &vector);
 172     } else {
 173         vector = VIRTIO_NO_VECTOR;
 174     }
 175     virtio_queue_set_vector(proxy->vdev, n, vector);
 176     if (vector != VIRTIO_NO_VECTOR) {
 177         return msix_vector_use(&proxy->pci_dev, vector);
 178     }
 179     return 0;
 180 }
 181
 182 static void virtio_pci_reset(DeviceState *d)
 183 {
 184     VirtIOPCIProxy *proxy = container_of(d, VirtIOPCIProxy, pci_dev.qdev);
 185     virtio_reset(proxy->vdev);
 186     msix_reset(&proxy->pci_dev);
 187     proxy->bugs = 0;
 188 }
 189
 190 static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val)
 191 {
 192     VirtIOPCIProxy *proxy = opaque;
 193     VirtIODevice *vdev = proxy->vdev;
 194     target_phys_addr_t pa;
 195
 196     switch (addr) {
 197     case VIRTIO_PCI_GUEST_FEATURES:
 198         /* Guest does not negotiate properly?  We have to assume nothing. */
 199         if (val & (1 << VIRTIO_F_BAD_FEATURE)) {
 200             if (vdev->bad_features)
 201                 val = proxy->host_features & vdev->bad_features(vdev);
 202             else
 203                 val = 0;
 204         }
 205         if (vdev->set_features)
 206             vdev->set_features(vdev, val);
 207         vdev->guest_features = val;
 208         break;
 209     case VIRTIO_PCI_QUEUE_PFN:
 210         pa = (target_phys_addr_t)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT;
 211         if (pa == 0) {
 212             virtio_reset(proxy->vdev);
 213             msix_unuse_all_vectors(&proxy->pci_dev);
 214         }
 215         else
 216             virtio_queue_set_addr(vdev, vdev->queue_sel, pa);
 217         break;
 218     case VIRTIO_PCI_QUEUE_SEL:
 219         if (val < VIRTIO_PCI_QUEUE_MAX)
 220             vdev->queue_sel = val;
 221         break;
 222     case VIRTIO_PCI_QUEUE_NOTIFY:
 223         virtio_queue_notify(vdev, val);
 224         break;
 225     case VIRTIO_PCI_STATUS:
 226         virtio_set_status(vdev, val & 0xFF);
 227         if (vdev->status == 0) {
 228             virtio_reset(proxy->vdev);
 229             msix_unuse_all_vectors(&proxy->pci_dev);
 230         }
 231
 232         /* Linux before 2.6.34 sets the device as OK without enabling
 233            the PCI device bus master bit. In this case we need to disable
 234            some safety checks. */
 235         if ((val & VIRTIO_CONFIG_S_DRIVER_OK) &&
 236             !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
 237             proxy->bugs |= VIRTIO_PCI_BUG_BUS_MASTER;
 238         }
 239         break;
 240     case VIRTIO_MSI_CONFIG_VECTOR:
 241         msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
 242         /* Make it possible for guest to discover an error took place. */
 243         if (msix_vector_use(&proxy->pci_dev, val) < 0)
 244             val = VIRTIO_NO_VECTOR;
 245         vdev->config_vector = val;
 246         break;
 247     case VIRTIO_MSI_QUEUE_VECTOR:
 248         msix_vector_unuse(&proxy->pci_dev,
 249                           virtio_queue_vector(vdev, vdev->queue_sel));
 250         /* Make it possible for guest to discover an error took place. */
 251         if (msix_vector_use(&proxy->pci_dev, val) < 0)
 252             val = VIRTIO_NO_VECTOR;
 253         virtio_queue_set_vector(vdev, vdev->queue_sel, val);
 254         break;
 255     default:
 256         fprintf(stderr, "%s: unexpected address 0x%x value 0x%x\n",
 257                 __func__, addr, val);
 258         break;
 259     }
 260 }
 261
 262 static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr)
 263 {
 264     VirtIODevice *vdev = proxy->vdev;
 265     uint32_t ret = 0xFFFFFFFF;
 266
 267     switch (addr) {
 268     case VIRTIO_PCI_HOST_FEATURES:
 269         ret = proxy->host_features;
 270         break;
 271     case VIRTIO_PCI_GUEST_FEATURES:
 272         ret = vdev->guest_features;
 273         break;
 274     case VIRTIO_PCI_QUEUE_PFN:
 275         ret = virtio_queue_get_addr(vdev, vdev->queue_sel)
 276               >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
 277         break;
 278     case VIRTIO_PCI_QUEUE_NUM:
 279         ret = virtio_queue_get_num(vdev, vdev->queue_sel);
 280         break;
 281     case VIRTIO_PCI_QUEUE_SEL:
 282         ret = vdev->queue_sel;
 283         break;
 284     case VIRTIO_PCI_STATUS:
 285         ret = vdev->status;
 286         break;
 287     case VIRTIO_PCI_ISR:
 288         /* reading from the ISR also clears it. */
 289         ret = vdev->isr;
 290         vdev->isr = 0;
 291         qemu_set_irq(proxy->pci_dev.irq[0], 0);
 292         break;
 293     case VIRTIO_MSI_CONFIG_VECTOR:
 294         ret = vdev->config_vector;
 295         break;
 296     case VIRTIO_MSI_QUEUE_VECTOR:
 297         ret = virtio_queue_vector(vdev, vdev->queue_sel);
 298         break;
 299     default:
 300         break;
 301     }
 302
 303     return ret;
 304 }
 305
 306 static uint32_t virtio_pci_config_readb(void *opaque, uint32_t addr)
 307 {
 308     VirtIOPCIProxy *proxy = opaque;
 309     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 310     addr -= proxy->addr;
 311     if (addr < config)
 312         return virtio_ioport_read(proxy, addr);
 313     addr -= config;
 314     return virtio_config_readb(proxy->vdev, addr);
 315 }
 316
 317 static uint32_t virtio_pci_config_readw(void *opaque, uint32_t addr)
 318 {
 319     VirtIOPCIProxy *proxy = opaque;
 320     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 321     addr -= proxy->addr;
 322     if (addr < config)
 323         return virtio_ioport_read(proxy, addr);
 324     addr -= config;
 325     return virtio_config_readw(proxy->vdev, addr);
 326 }
 327
 328 static uint32_t virtio_pci_config_readl(void *opaque, uint32_t addr)
 329 {
 330     VirtIOPCIProxy *proxy = opaque;
 331     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 332     addr -= proxy->addr;
 333     if (addr < config)
 334         return virtio_ioport_read(proxy, addr);
 335     addr -= config;
 336     return virtio_config_readl(proxy->vdev, addr);
 337 }
 338
 339 static void virtio_pci_config_writeb(void *opaque, uint32_t addr, uint32_t val)
 340 {
 341     VirtIOPCIProxy *proxy = opaque;
 342     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 343     addr -= proxy->addr;
 344     if (addr < config) {
 345         virtio_ioport_write(proxy, addr, val);
 346         return;
 347     }
 348     addr -= config;
 349     virtio_config_writeb(proxy->vdev, addr, val);
 350 }
 351
 352 static void virtio_pci_config_writew(void *opaque, uint32_t addr, uint32_t val)
 353 {
 354     VirtIOPCIProxy *proxy = opaque;
 355     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 356     addr -= proxy->addr;
 357     if (addr < config) {
 358         virtio_ioport_write(proxy, addr, val);
 359         return;
 360     }
 361     addr -= config;
 362     virtio_config_writew(proxy->vdev, addr, val);
 363 }
 364
 365 static void virtio_pci_config_writel(void *opaque, uint32_t addr, uint32_t val)
 366 {
 367     VirtIOPCIProxy *proxy = opaque;
 368     uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
 369     addr -= proxy->addr;
 370     if (addr < config) {
 371         virtio_ioport_write(proxy, addr, val);
 372         return;
 373     }
 374     addr -= config;
 375     virtio_config_writel(proxy->vdev, addr, val);
 376 }
 377
 378 static void virtio_map(PCIDevice *pci_dev, int region_num,
 379                        pcibus_t addr, pcibus_t size, int type)
 380 {
 381     VirtIOPCIProxy *proxy = container_of(pci_dev, VirtIOPCIProxy, pci_dev);
 382     VirtIODevice *vdev = proxy->vdev;
 383     unsigned config_len = VIRTIO_PCI_REGION_SIZE(pci_dev) + vdev->config_len;
 384
 385     proxy->addr = addr;
 386
 387     register_ioport_write(addr, config_len, 1, virtio_pci_config_writeb, proxy);
 388     register_ioport_write(addr, config_len, 2, virtio_pci_config_writew, proxy);
 389     register_ioport_write(addr, config_len, 4, virtio_pci_config_writel, proxy);
 390     register_ioport_read(addr, config_len, 1, virtio_pci_config_readb, proxy);
 391     register_ioport_read(addr, config_len, 2, virtio_pci_config_readw, proxy);
 392     register_ioport_read(addr, config_len, 4, virtio_pci_config_readl, proxy);
 393
 394     if (vdev->config_len)
 395         vdev->get_config(vdev, vdev->config);
 396 }
 397
 398 static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
 399                                 uint32_t val, int len)
 400 {
 401     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 402
 403     if (PCI_COMMAND == address) {
 404         if (!(val & PCI_COMMAND_MASTER)) {
 405             if (!(proxy->bugs & VIRTIO_PCI_BUG_BUS_MASTER)) {
 406                 virtio_set_status(proxy->vdev,
 407                                   proxy->vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK);
 408             }
 409         }
 410     }
 411
 412     pci_default_write_config(pci_dev, address, val, len);
 413     msix_write_config(pci_dev, address, val, len);
 414 }
 415
 416 static unsigned virtio_pci_get_features(void *opaque)
 417 {
 418     VirtIOPCIProxy *proxy = opaque;
 419     return proxy->host_features;
 420 }
 421
 422 static void virtio_pci_guest_notifier_read(void *opaque)
 423 {
 424     VirtQueue *vq = opaque;
 425     EventNotifier *n = virtio_queue_get_guest_notifier(vq);
 426     if (event_notifier_test_and_clear(n)) {
 427         virtio_irq(vq);
 428     }
 429 }
 430
 431 static int virtio_pci_set_guest_notifier(void *opaque, int n, bool assign)
 432 {
 433     VirtIOPCIProxy *proxy = opaque;
 434     VirtQueue *vq = virtio_get_queue(proxy->vdev, n);
 435     EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
 436
 437     if (assign) {
 438         int r = event_notifier_init(notifier, 0);
 439         if (r < 0) {
 440             return r;
 441         }
 442         qemu_set_fd_handler(event_notifier_get_fd(notifier),
 443                             virtio_pci_guest_notifier_read, NULL, vq);
 444     } else {
 445         qemu_set_fd_handler(event_notifier_get_fd(notifier),
 446                             NULL, NULL, NULL);
 447         event_notifier_cleanup(notifier);
 448     }
 449
 450     return 0;
 451 }
 452
 453 static int virtio_pci_set_host_notifier(void *opaque, int n, bool assign)
 454 {
 455     VirtIOPCIProxy *proxy = opaque;
 456     VirtQueue *vq = virtio_get_queue(proxy->vdev, n);
 457     EventNotifier *notifier = virtio_queue_get_host_notifier(vq);
 458     int r;
 459     if (assign) {
 460         r = event_notifier_init(notifier, 1);
 461         if (r < 0) {
 462             return r;
 463         }
 464         r = kvm_set_ioeventfd_pio_word(event_notifier_get_fd(notifier),
 465                                        proxy->addr + VIRTIO_PCI_QUEUE_NOTIFY,
 466                                        n, assign);
 467         if (r < 0) {
 468             event_notifier_cleanup(notifier);
 469         }
 470     } else {
 471         r = kvm_set_ioeventfd_pio_word(event_notifier_get_fd(notifier),
 472                                        proxy->addr + VIRTIO_PCI_QUEUE_NOTIFY,
 473                                        n, assign);
 474         if (r < 0) {
 475             return r;
 476         }
 477         event_notifier_cleanup(notifier);
 478     }
 479     return r;
 480 }
 481
 482 static const VirtIOBindings virtio_pci_bindings = {
 483     .notify = virtio_pci_notify,
 484     .save_config = virtio_pci_save_config,
 485     .load_config = virtio_pci_load_config,
 486     .save_queue = virtio_pci_save_queue,
 487     .load_queue = virtio_pci_load_queue,
 488     .get_features = virtio_pci_get_features,
 489     .set_host_notifier = virtio_pci_set_host_notifier,
 490     .set_guest_notifier = virtio_pci_set_guest_notifier,
 491 };
 492
 493 static void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev,
 494                             uint16_t vendor, uint16_t device,
 495                             uint16_t class_code, uint8_t pif)
 496 {
 497     uint8_t *config;
 498     uint32_t size;
 499
 500     proxy->vdev = vdev;
 501
 502     config = proxy->pci_dev.config;
 503     pci_config_set_vendor_id(config, vendor);
 504     pci_config_set_device_id(config, device);
 505
 506     config[0x08] = VIRTIO_PCI_ABI_VERSION;
 507
 508     config[0x09] = pif;
 509     pci_config_set_class(config, class_code);
 510
 511     config[0x2c] = vendor & 0xFF;
 512     config[0x2d] = (vendor >> 8) & 0xFF;
 513     config[0x2e] = vdev->device_id & 0xFF;
 514     config[0x2f] = (vdev->device_id >> 8) & 0xFF;
 515
 516     config[0x3d] = 1;
 517
 518     if (vdev->nvectors && !msix_init(&proxy->pci_dev, vdev->nvectors, 1, 0)) {
 519         pci_register_bar(&proxy->pci_dev, 1,
 520                          msix_bar_size(&proxy->pci_dev),
 521                          PCI_BASE_ADDRESS_SPACE_MEMORY,
 522                          msix_mmio_map);
 523     } else
 524         vdev->nvectors = 0;
 525
 526     proxy->pci_dev.config_write = virtio_write_config;
 527
 528     size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) + vdev->config_len;
 529     if (size & (size-1))
 530         size = 1 << qemu_fls(size);
 531
 532     pci_register_bar(&proxy->pci_dev, 0, size, PCI_BASE_ADDRESS_SPACE_IO,
 533                            virtio_map);
 534
 535     virtio_bind_device(vdev, &virtio_pci_bindings, proxy);
 536     proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
 537     proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE;
 538     proxy->host_features = vdev->get_features(vdev, proxy->host_features);
 539 }
 540
 541 static int virtio_blk_init_pci(PCIDevice *pci_dev)
 542 {
 543     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 544     VirtIODevice *vdev;
 545
 546     if (proxy->class_code != PCI_CLASS_STORAGE_SCSI &&
 547         proxy->class_code != PCI_CLASS_STORAGE_OTHER)
 548         proxy->class_code = PCI_CLASS_STORAGE_SCSI;
 549
 550     vdev = virtio_blk_init(&pci_dev->qdev, &proxy->block);
 551     if (!vdev) {
 552         return -1;
 553     }
 554     vdev->nvectors = proxy->nvectors;
 555     virtio_init_pci(proxy, vdev,
 556                     PCI_VENDOR_ID_REDHAT_QUMRANET,
 557                     PCI_DEVICE_ID_VIRTIO_BLOCK,
 558                     proxy->class_code, 0x00);
 559     /* make the actual value visible */
 560     proxy->nvectors = vdev->nvectors;
 561     return 0;
 562 }
 563
 564 static int virtio_exit_pci(PCIDevice *pci_dev)
 565 {
 566     return msix_uninit(pci_dev);
 567 }
 568
 569 static int virtio_blk_exit_pci(PCIDevice *pci_dev)
 570 {
 571     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 572
 573     virtio_blk_exit(proxy->vdev);
 574     blockdev_mark_auto_del(proxy->block.bs);
 575     return virtio_exit_pci(pci_dev);
 576 }
 577
 578 static int virtio_serial_init_pci(PCIDevice *pci_dev)
 579 {
 580     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 581     VirtIODevice *vdev;
 582
 583     if (proxy->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
 584         proxy->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
 585         proxy->class_code != PCI_CLASS_OTHERS)          /* qemu-kvm  */
 586         proxy->class_code = PCI_CLASS_COMMUNICATION_OTHER;
 587
 588     vdev = virtio_serial_init(&pci_dev->qdev, proxy->max_virtserial_ports);
 589     if (!vdev) {
 590         return -1;
 591     }
 592     vdev->nvectors = proxy->nvectors == DEV_NVECTORS_UNSPECIFIED
 593                                         ? proxy->max_virtserial_ports + 1
 594                                         : proxy->nvectors;
 595     virtio_init_pci(proxy, vdev,
 596                     PCI_VENDOR_ID_REDHAT_QUMRANET,
 597                     PCI_DEVICE_ID_VIRTIO_CONSOLE,
 598                     proxy->class_code, 0x00);
 599     proxy->nvectors = vdev->nvectors;
 600     return 0;
 601 }
 602
 603 static int virtio_serial_exit_pci(PCIDevice *pci_dev)
 604 {
 605     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 606
 607     virtio_serial_exit(proxy->vdev);
 608     return virtio_exit_pci(pci_dev);
 609 }
 610
 611 static int virtio_net_init_pci(PCIDevice *pci_dev)
 612 {
 613     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 614     VirtIODevice *vdev;
 615
 616     vdev = virtio_net_init(&pci_dev->qdev, &proxy->nic);
 617
 618     vdev->nvectors = proxy->nvectors;
 619     virtio_init_pci(proxy, vdev,
 620                     PCI_VENDOR_ID_REDHAT_QUMRANET,
 621                     PCI_DEVICE_ID_VIRTIO_NET,
 622                     PCI_CLASS_NETWORK_ETHERNET,
 623                     0x00);
 624
 625     /* make the actual value visible */
 626     proxy->nvectors = vdev->nvectors;
 627     return 0;
 628 }
 629
 630 static int virtio_net_exit_pci(PCIDevice *pci_dev)
 631 {
 632     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 633
 634     virtio_net_exit(proxy->vdev);
 635     return virtio_exit_pci(pci_dev);
 636 }
 637
 638 static int virtio_balloon_init_pci(PCIDevice *pci_dev)
 639 {
 640     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 641     VirtIODevice *vdev;
 642
 643     vdev = virtio_balloon_init(&pci_dev->qdev);
 644     virtio_init_pci(proxy, vdev,
 645                     PCI_VENDOR_ID_REDHAT_QUMRANET,
 646                     PCI_DEVICE_ID_VIRTIO_BALLOON,
 647                     PCI_CLASS_MEMORY_RAM,
 648                     0x00);
 649     return 0;
 650 }
 651
 652 #ifdef CONFIG_VIRTFS
 653 static int virtio_9p_init_pci(PCIDevice *pci_dev)
 654 {
 655     VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
 656     VirtIODevice *vdev;
 657
 658     vdev = virtio_9p_init(&pci_dev->qdev, &proxy->fsconf);
 659     virtio_init_pci(proxy, vdev,
 660                     PCI_VENDOR_ID_REDHAT_QUMRANET,
 661                     0x1009,
 662                     0x2,
 663                     0x00);
 664
 665     return 0;
 666 }
 667 #endif
 668
 669 static PCIDeviceInfo virtio_info[] = {
 670     {
 671         .qdev.name = "virtio-blk-pci",
 672         .qdev.size = sizeof(VirtIOPCIProxy),
 673         .init      = virtio_blk_init_pci,
 674         .exit      = virtio_blk_exit_pci,
 675         .qdev.props = (Property[]) {
 676             DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
 677             DEFINE_BLOCK_PROPERTIES(VirtIOPCIProxy, block),
 678             DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
 679             DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy, host_features),
 680             DEFINE_PROP_END_OF_LIST(),
 681         },
 682         .qdev.reset = virtio_pci_reset,
 683     },{
 684         .qdev.name  = "virtio-net-pci",
 685         .qdev.size  = sizeof(VirtIOPCIProxy),
 686         .init       = virtio_net_init_pci,
 687         .exit       = virtio_net_exit_pci,
 688         .romfile    = "pxe-virtio.bin",
 689         .qdev.props = (Property[]) {
 690             DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
 691             DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy, host_features),
 692             DEFINE_NIC_PROPERTIES(VirtIOPCIProxy, nic),
 693             DEFINE_PROP_END_OF_LIST(),
 694         },
 695         .qdev.reset = virtio_pci_reset,
 696     },{
 697         .qdev.name = "virtio-serial-pci",
 698         .qdev.alias = "virtio-serial",
 699         .qdev.size = sizeof(VirtIOPCIProxy),
 700         .init      = virtio_serial_init_pci,
 701         .exit      = virtio_serial_exit_pci,
 702         .qdev.props = (Property[]) {
 703             DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
 704                                DEV_NVECTORS_UNSPECIFIED),
 705             DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
 706             DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
 707             DEFINE_PROP_UINT32("max_ports", VirtIOPCIProxy, max_virtserial_ports,
 708                                31),
 709             DEFINE_PROP_END_OF_LIST(),
 710         },
 711         .qdev.reset = virtio_pci_reset,
 712     },{
 713         .qdev.name = "virtio-balloon-pci",
 714         .qdev.size = sizeof(VirtIOPCIProxy),
 715         .init      = virtio_balloon_init_pci,
 716         .exit      = virtio_exit_pci,
 717         .qdev.props = (Property[]) {
 718             DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
 719             DEFINE_PROP_END_OF_LIST(),
 720         },
 721         .qdev.reset = virtio_pci_reset,
 722     },{
 723 #ifdef CONFIG_VIRTFS
 724         .qdev.name = "virtio-9p-pci",
 725         .qdev.size = sizeof(VirtIOPCIProxy),
 726         .init      = virtio_9p_init_pci,
 727         .qdev.props = (Property[]) {
 728             DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
 729             DEFINE_PROP_STRING("mount_tag", VirtIOPCIProxy, fsconf.tag),
 730             DEFINE_PROP_STRING("fsdev", VirtIOPCIProxy, fsconf.fsdev_id),
 731             DEFINE_PROP_END_OF_LIST(),
 732         },
 733     }, {
 734 #endif
 735         /* end of list */
 736     }
 737 };
 738
 739 static void virtio_pci_register_devices(void)
 740 {
 741     pci_qdev_register_many(virtio_info);
 742 }
 743
 744 device_init(virtio_pci_register_devices)